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  • New item   Auxiliary contact block for LC1K contactors | 2NO + 2NC | top-mounted on the contactor
    New item   Auxiliary contact block for LC1K contactors | 2NO + 2NC | top-mounted on the contactor 1

    Auxiliary contact block for LC1K contactors | 2NO + 2NC | top-mounted on the contactor

    Code: LA1KN22
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    Price 8.22 € VAT incl.
    ( 6.79 € VAT excl. )
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    Auxiliary contact block designed for LC1K series contactors. The block is mounted on top of the contactor and provides 2 normally open (2NO) and 2 normally closed (2NC) auxiliary contacts. It is used to expand the contactor’s control, signalling, interlocking and automation circuits. 
  • Product description

    Auxiliary contact block for LC1K contactors | 2NO + 2NC | top-mounted

    An auxiliary contact block designed for LC1K series contactors. The block is mounted on top and provides 2 normally open (2NO) and 2 normally closed (2NC) auxiliary contacts. It is used to expand control, signaling, interlocking, and automation circuits of the contactor.

    Key concept:
    This is a practical solution when you need additional signaling or control contacts for an existing LC1K contactor. The contact block helps implement more complex electrical schemes: self-holding, interlocking, status indication, signaling, or other device control functions.
    Model
    LA1KN22
    Contact configuration
    2NO + 2NC
    Mounting
    On top of the contactor
    Compatibility
    LC1K series contactors

    Operating principle

    The auxiliary contact block is mechanically coupled with the contactor. When the contactor coil receives voltage and the contactor switches on, the contacts of the auxiliary block switch simultaneously.

    Normally open (NO) contacts close when the contactor is energized, while normally closed (NC) contacts open when the contactor is energized. This way, you can relay the contactor's status signal, control another relay or contactor, turn on an indicator light, or establish electrical interlocking.

    What does 2NO + 2NC mean?
    The block features four additional auxiliary contacts: 2 normally open contacts that close when the contactor is triggered, and 2 normally closed contacts that open when the contactor is triggered.

    Technical specifications

    Product type Auxiliary contact block
    Model / Code LA1KN22
    Contact configuration 2NO + 2NC
    Normally open contacts 2 pcs. NO
    Normally closed contacts 2 pcs. NC
    Mounting location Top-mounted on the contactor
    Compatibility LC1K series contactors
    Application Control, signaling, interlocking, and automation circuits
    Weight 0.04 kg

    Where is it used?

    • Motor control panels – for contactor status signaling and mutual interlocking.
    • Automation cabinets – for additional control and feedback loops.
    • Lighting control systems – to relay contactor signals or manage additional lighting groups.
    • Pump and fan control circuits – to create operation, fault, or start signals.
    • Reversing control circuits – to implement electrical interlocking between two contactors.
    • Industrial equipment – to connect relays, PLC inputs, indicator lights, or alarm systems.

    Practical mounting example

    For example, an LC1K contactor controls an electric motor. An LA1KN22 auxiliary contact block is mounted on top of the contactor. One NO contact can be used to switch on a green indicator light when the motor is running, and one NC contact can be used to block another contactor, ensuring both are not switched on simultaneously.

    The remaining contacts can be used to pass a signal to a PLC controller, switch on an auxiliary relay, control a signal tower, or implement any other function of a specific electrical scheme.

    Usage according to need

    Electrician: a convenient solution when an already installed LC1K contactor requires extra contacts for a signal light, self-holding circuit, interlocking, or other control function.

    Automation Engineer: the contact block can be used to transmit the contactor's status to a PLC, relay, alarm system, or other control equipment.

    Panel Builder: top-mounted, helping to compactly expand the contactor's functionality without replacing the main contactor model.

    Pros

    • 2NO + 2NC contacts – four additional contacts in one block.
    • Top mounting – convenient and compact solution.
    • Designed for LC1K series – tailored to specific contactors.
    • Suitable for control and signaling schemes – helps expand contactor functions.
    • Useful in interlocking circuits – especially relevant for reversing or multi-contactor control.
    • Low weight – only 0.04 kg.

    Cons / Limitations

    • Not for power circuits – used for auxiliary control and signaling functions.
    • Limited compatibility – must check if the contactor series is LC1K before ordering.
    • Mounting space – requires sufficient free space above the contactor.
    • Scheme must be evaluated – incorrectly selected contact usage can disrupt the control circuit.

    Safety and installation notes

    The auxiliary contact block is part of an electrical control system; therefore, its connection and installation must be performed by a qualified specialist, following the documentation of the specific contactor and electrical scheme.

    • Before installation, you must disconnect electrical power and ensure there is no voltage in the circuit.
    • Check contactor compatibility – the block must be used only with suitable LC1K series equipment.
    • Do not use auxiliary contacts as power contacts, unless specified by the manufacturer's technical data.
    • Connect wires according to the electrical scheme and ensure proper terminal tightening.
    • After installation, test operation – ensure that the NO and NC contacts switch according to the intended scheme.

    Quick selection guide

    This auxiliary contact block is suitable when the LC1K contactor lacks sufficient integrated auxiliary contacts and you require extra control, signaling, or interlocking circuits.

    Contacts
    2NO + 2NC
    Mounting
    On top
    Usage
    Control and signaling
    Compatibility
    LC1K series
    Suitable when you need:
    • additional NO and NC contacts for contactor control;
    • to signal the contactor's ON/OFF status;
    • to create an electrical interlocking circuit;
    • to transmit the contactor status to a PLC, relay, or indicator light;
    • to expand LC1K contactor functionality.
    Check before ordering:
    • whether your contactor belongs to the LC1K series;
    • how many and what type of contacts are needed for the specific scheme;
    • whether there is enough space above the contactor to mount the block;
    • whether auxiliary contacts will be used only for auxiliary control circuits.
    Important reminder:
    This is an auxiliary contact block, intended for signaling and control circuits. It is not a replacement for the contactor's main power poles.

    FAQ – Frequently Asked Questions

    What does 2NO + 2NC mean?
    It means that the contact block contains two normally open contacts and two normally closed contacts.
    Is this block intended for power circuits?
    No. It is intended for auxiliary control, signaling, interlocking, and automation circuits.
    Where is the LA1KN22 contact block mounted?
    It is mounted on top of a compatible LC1K series contactor.
    What are auxiliary NO contacts useful for?
    NO contacts can be used for self-holding circuits, operational status indication, switching on an auxiliary relay, or transmitting a signal to a PLC system.
    What are auxiliary NC contacts useful for?
    NC contacts are often used in interlocking, safety, and mutual contactor control schemes, where the control circuit of one contactor needs to be disconnected when another is energized.
    Can I install it myself?
    It is recommended to have electrical control equipment installed by a qualified electrician who can verify compatibility and wire the block according to the electrical scheme.

    Additional contacts for greater LC1K contactor functionality

    The auxiliary contact block with 2NO + 2NC configuration helps quickly expand the capabilities of the LC1K contactor when you need more control, signaling, or interlocking contacts.

    This is a compact solution for electrical cabinets, motor control systems, automation circuits, and various industrial equipment where clear management of the contactor state and reliable electrical logic are important.

    Illustrative image may have been created using AI. The appearance of the product may differ slightly from the image shown. Please refer to the technical specification.
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